Food grade lubricants

H1 lubricants are permitted for incidental food contact, used above or near the product stream. H2 is for points with no possibility of contact. H3 covers soluble oils used to prevent rust on hooks and trolleys, which may contact food directly but must be cleaned off per procedure.

Check the NSF registration number on the label and look it up in the online NSF White Book listing, matching the exact product name and H1 category. A logo alone is not enough; the trade name must match, because one brand may sell H1 and non-H1 products with similar names.

Synthetic PAO-based H1 products now cover most applications well, including gearboxes, chains, bearings and hydraulics. The main limit is a narrower list of permitted additives, so very heavy loads need a product with approved EP additives.

List every lubrication point, drain and flush each system to remove non-H1 oil, then colour-label lube points and grease guns to prevent mix-ups. HACCP or audit files usually require the lubrication schedule and each product's registration certificate.

Shelf life depends on the base oil and additives rather than on H1 status. Some H1 products contain an antimicrobial additive and should be used within the date on the pack to keep that effect. Store them sealed and segregated from industrial lubricants in the store to prevent mix-ups.

Keep a list of lubrication points with product name, NSF registration number and interval. File the registration certificate and safety data sheet for each product. Logging quantities used and who did the work helps demonstrate control when auditors ask.

Most PAO or white oil based H1 products are compatible with the NBR and FKM commonly used. PAG or ester based H1 products can swell some elastomers or lift paint, so check the maker's compatibility chart. After a changeover, watch the seals for leaks during the first few weeks.

Yes, and this is a common application: conveyor chains, packaging machine bearings and filler gearboxes. Beverage conveyors often use dry or diluted water based conveyor lubricants, which must be compatible with PET bottles to avoid stress cracking. Points washed down frequently need an H1 grease with good water resistance.